Equalizer bearing for pumpers



Nov. 23, 1943. C. E. ANDERSON 2,334,741

EQUALIZER BEARING FOR PUMPERS Filed May e, 1941` flllflllllf Jlwcntor:

Vf/ford f Ande/"$00,

tranemittedY vthrongl 'in aA device of the oharaeteilsetfforth Y i i going an equalizer member, yfrizlaide" preferably in the form 'ofY a. 'central' fuleruniy beam; having' Patented Nov.23, 1,943 Y 'V10 Claims.

My invention relates to means fer transmitting movement fro'rnpaV rotati power device to a-reciprocating member; and1r relate'sj'partic'ularly `to a self -equalizing 'c'oimedtio'rrwhereby." 'a pumping lever or walking beamfmayjbe- "operated hva crank `device having `a pair oufgc-raks which` are connected to the `walking beam `tlrrlzuig-h` a pair oflpitman's.r f I Y A long usedlpraotioe'n the Azartoffpunlliiig -liquid` from wells ha'sf-been toreoiproate the 'Walking beam` by connecting it througharpitnfian `tb a crank mounted o nl "an ei'idof aferankA shaft ldriven by-`some convenient"source `of power. As acranks'so used, is rotated, the forces transrrritte'd fromf'the snai-tto the bearings-supporting the same; reverse-during the upper and-*lower halves of the' rotationv of' the feraik-,f The resulting pounding action, Whereasih'gleorank is used, is concentrated prin'cipallyi in the bearing adjacent the ncrank. IthasVV been f-e'uhd thaty the; ra'nk structures employedinpumpihg fdevices may `be lever uffa' pumpingdevice of the -ge'ne'ral Vtype employed to pufmp'oii treinen-Wells. Y

It is' a further objectwofthe invention to pro= vide a selfeequaliziiig `:`meaif1's-` for eonnectng the beam in suolav4 amarmer that-smallfvariations the dimensionsof--the `cooperatinjg"partsand'sinall 'dsalig'l'fin'ien-tsA of cooperating vpartis may be reaciily` compensated for; and wherby the-forces thelpi'tmans; or connecting links `Will be equaliZecif-and yaeordiifrfglv'ftl'ie forces and reactions operating the' crarifks'v and ":iank

meansforconnec'ting thefends thereofto the pitmans-,and having simplemeansl-for flexibly oonnecting the middle or intermediate portion ofthe equalizing member to the Walking bea-m, whereby movement Willbe-ti'a'nsmittedffromthe equalizing memberthrough the eiblefoonneeton tothe o for small inaccuraciesanddimesionsiii thejforlifn'atio'nla'n'd adjustment.or assembly oi "the c0- andthe walking,b'eamigvpeinitditofwmeensate operating parts oftheY dex/irse; Af further froloect of thepinvention is to provide .an-"equalizlng'de- YviceA ofthel character 'heren set forth'comprising Y ble member 'operatively'comectmg the intermein: nl equalizing device'. ofltli'eeharactet Set' forth iiftlie' preceding: paragraph mears for connect.-

mg l une' :mtrmeaiaufporcidrr lof. the equalizer .beam .toi the1 walking beam comprising a body` of beam, and will permit a limited relative swinging movement 'of` theequalizer vteam fand. therwalkin'g bea-m5whileamovementlisfbeingI transmittedfrom tierequallzerbeamthrough: thebodyofl rubbery the: term mbb'ery materiali" to meanal 'material havin@ ther `generar' characteristics "dfi rubber, rubber commandi, or: synthetieL-mbben; whiehis internally-derden Ble 'by'.fforees applied thereto so that avchageir shape Wllltake place` in the -rnateriall in.A responsefto variations m the forces applied tothefmat'eria 1 -v E AA-furtherobectfd the' vinvention i'slto provide arr' 'equalizer .fdevioe ofi-this general character 'wherein the. equalizer llem is. connected to*` the lever" armi tzlirouglr.{Jisei-f si'eevei frlbl'e'r'y I'iat'eriai lVvfliohl"substaritiafll i," surroundsl the in- -termediatefportion oi the equalizerbeam, and a shell which-surroundsat least asubsta'tial por; tionfofs thi-irubbersle'evei` whereby operative eo'n' fl'xectioarx isrebtained withlztheilever arm.y A. further object of tiieinventiori ig: tez; provide a'. conneetion `of :the -chaiaeter' setz lfort-li. in the preceding paragraph wherein the shell surrounds three sideszljof. fthessleeve'and manips .the remain-e ing: or :fourth fsifsle; A of fthe vsleeve 13o-.ai pa-rt carried bythe leverarmfin suchxa lmannertilcfti1`e rub- Y bery'material fofz thesleeve isfplaced under oom- Walking beamer-1d z'd''fliey same time af'relative 'swing-ing movement of the" etnializin-gV member pression', thereby firmly. @nipping*the-intermedi; ate portion" of theequaiizer beam, yet permitting alimitedlswinging movement `lof'h the beamtozcempensate forz-the .faeto1s1ofdimension, disagnment:andfadjiistment'hereinbeforereferred to.

A further l :featuie offythel ihventi'on'l resides in' the" proviionf of an interengalgementbetween the equalizer beam and the shell to limit. relative movement of the equalizer beam and the shellv in .event of the failure of the sleeve of frubbery material,-for the purpose which 'Will beset forth later herein. v

A .further object of` the invention relates to @ther provision of shock absorbing or cushioning vaaai/nii means in aV pumping device of the v,character disclosed. `r In a counterbalanced pumpen' ysuch as disclosed inthe drawing, the direction' of lforce transmission from the pitmans to the Walking beam is reversed two times during each pumping i cycle. The present invention prddesgmeans for-1 cushioning the reversal stresses through a rubber l body which likewise lsupports .the later alfbeairroiI i 1 vthe `device for limited universal'radiustingmo ment.

the specication. v n Y :QReierring to the v ,drawing'which isfor illustrative purposes-,.only: 5, ..1

. 1 Fig. r1 is an. elevational A4[viewshowing la., pumping.appel.atus employing a preferred embodiment offmyinvention... .1 f

,.Fig.2.is an enlarged partij-sectioned'.(view, Y taken on a.. plane indicated by `the line-.ZK-Zqof Fig-.14. l .n ,..,1,. YwfFig. 3 is` a fragmentary:.cross-section.taken as indicated bythe line`3-3 .of Fig. 2. .v

' Fig. .4 agperspective lview oil-*theshellremployed in thefflexible connection.ofV theequalizer beam to the pumping lever. ...They environment in Vwhich my,invention, at

: resent flndsfitsprincipal use. isili a pumping jack, such as showninFig. l,y whereinapumping lever- I0 ismountedbymeans of a bearing II at the 'upper end-oa Samson post I2Y so that it will swing; in: a vertical. plane. `A horse head. I 3 fat tl'iefrontend of the pumping arm I0.or walking beam,.is connected tothe upper end .orastring of suckerrods .14. lOnthe-b/ase.. I5 which carries.

thefSamson -Y post I2, a;reductiongear, case'IE is l.r'nountedg this reductionlgear case havinggan input pulley;ILwhichfrrraybe driven by ,a suitfable power-source suchasa motor: I8 Amounted alsoon the baseIS...` Thepower outputshaft 25, carriedbyfthecase Ighas b oth ends thereof prokjecting so that upon Leach of' these endsa crank 2| maybe secured., ;;'Ihe,;cranks,. only one xof Vil which is shownfA-inzthe elevational View.,Y Fig.. 1, are'made induplicate so that `the elective lever Varm of each crankwilLbe'theisame. Eromthe outer` end ofY each crank.21,;apitman'22.isextended upward so that `the .upper or.; far ends of f such pitmans v,will lie in the regionoftherear Y portion of the. pumping leverorwa1king beam I0.

To transmit reciprocating movement tothe arm lll fromthe pitmans22,;1provide`a selfvequalizingconnection 23, whicha s best shown in Figs'. 2 andf3, vcomprises ani'equalizing member madepreferablyin the form ofabeamV tapering fromjthe intermediate Yportion thereof toward theends and havingvprojecting trunnions 24 through whichengagement .fof-the .beam 24 lis made-with theupper or farendsof thepitmans 22. The trunnionsizll support*self-aligningbearings`25,ithe outergraces 26 of -Whichare contained Further objects and advantageslbf .the inven-i tion will be brought out inthe following part oi nected to the crank pins of the crank members 2| by self-aligning bearings 25', of the same type as shown, at

Fig. 2. f Y

To iiexibly connect the central portion of the equalizer beam 24 to the pumping lever or Walking beam I0, I provide a body'of rubbery mate-V rial 3| Ain theiorm of a rectangular sleeve ar-j ranged to rit snugly around ztherintermediate, vportie-n of the equalizer beam .24, and to have operativeconnection with the pumping lever I0., r `As shown in Fig. 4, a casing 32 is provided, this i jcasinghaving a shell which ts around-three sides of the rubber'sleeve 3l. It has a. top Wall 33 'and'sidewalls 34 on the lower ends of which theshell or casing 3 2-while, movement is transrnittedprrom the equalizer beam v24;thro ugh =the l sleeve;- 3 I to: theshell i 32 and the "pumping Ylever lor walking-beam I0.

For the purpose of rn intaining thefsle'evetj .in

a centralizedposition lrelative to the equalizer` ,.beamZ-d, Ihave shown shallow notches 39in` the v` upperandlower-faces 'of the intermediate por]- 44tiono'jf the equalizer ubeam 2.4 to receivei'the'upper and lowerportions .ofthepsleeve 3| A fea- Ytureoi Vtheinventionjis, tofso form the intermediate -vpurtienfgn ofv the equalizer ,beamfla' the sleeve, 3 l;and the shell 32,- thatwhen the parts',` are assembled in theA relationY shown Figs.` 2 and 3,-the rubbery material of the sleeve .3l;'Will--fbe under.compression soA as to, tightlyA v )grip thef intermediate portion; of,V the equalizer member, yet permitjA swinging movementtherev o f. .jlheuppergand lower-,walls 42 and `43 of the Aoi the-front endfISV Qflthewalking beam; shown ina bearingcasing 2.1 secured by bolts'28 to the uppenends of the pitmans. The innerV races of the bearings, vas shown at 29, are spheroidal, so that the bearings25providea `flexible 'connection, Within reasonablel limits ,of the pitmans22 with lthe. ends of the equalizing beam24.. iThe lower, or near,1ends of the pitmans 22A arefcon- ,.sleeveel maybe ordinarily placedunderyaninitial-compression substantially. equal to; the pup-f .;vvardand downward force transmitted from the .equalizer-beam V24 to-theshell 32 and the walking ,beam :I0 .T1..1e .Side walls .0f/the l,sleeve 3l. are

:made Sgthet .t11eyvi1-l just Slidefinto the-.space provided-by the sidewalls 34 v0f tl1e shell32, but the vertical-i' dimension of` the rsleeve ISI-isv Vmade slightly greater thanvthedvertical dimension of the space Vvformed within the Shell `112 lby the-side Wallsv34 -andv thetop wall 33, With-thev result that ,when the `.sleeve and; the intermediate benign ef the .equa1-iztrV beam 24. 'are .assembled .Within the. Shell'.,3,2. the ,lower part 0f' the sleeve 3 I y will project below the ,lower-face of the-flanges A35, and when vtlie-slflell 3 2 is boltedonto the upper face of the-walking beam I9,j byuse of bolts 65, the sleeve-3.1Will be placed under compression. L".esf.,ShQWrl.'.in Fig 3. the ltrip..;.1.1a1.1ee 46m the Ybeam Vl 0 fh'es; OpelfirlasY 41: spaced therealong to receive thetbolts 45,, end tolenalble Vthe shell 32 i0 zeer-'Secured gin'- different .positions along :the .Wallsiebeam .llt whereby theleveraeepr stroke alwrse headmaxheyaned without changing the cranks 2| but merely by shiftingthecon- .nection .Malone the rear portion V(if-,the wainng beam Il).Y f

...interconnecting th'e-s'hujsz @aan fitter.

` mediate portion of the equalizerbeam 24, to serve inthe, eventof failure 0f the .Sleeve .31'. .is prevded by a pinAv 48 which-is' passed through openings 49 the intermediate. portion 40 of the equalizer the upper ends of the pitmans 22, inV

inseam; Y

Y @member and imeside iwallsiof ithefrsieevef infinis spin 143,rlieingof,suchf-lengththat-.Ether ends :.50

there'offvvill 'engage verticalffgro'ovesv 151 f'ormed to preventrtne 'equalizer ,beam :rri'nnmoving flat- @le enen equaiizingmemberf'extenuin gla'eress 'the I ing lever and said connecting means to permit a Y circumductory swinging movement of said equalizing means relative to said pumping lever.

2. In a pumping device having a pumping lever, an equalizing member extending across the pumping lever and a pair of pitmans connected at the ends of the equalizing member: equalizing bearing means for said equa-lizing Vmember and pumping lever comprising a flexible member engaging the intermediate portion of said equalizing member and said pumpingleven'said exible member embracinga body of rubbery material, there being means to hold l said ilexible member in cooperative relation to said pumping lever and said equalizing member sothat movement will be transmitted from said equalizing member to said pumping lever and said'eq'ualizing member may have universal swinging movement relative to said pumping lever in consequence ofthe yield` gaging the intermediate portion of said equaliz-' v ing member and said pumping lever, said flexible member comprising a body of compressedrubbery materialv and means to hold said body in coperative relation to said pumping lever and said equalizing member so, that movementV will be transmitted from said equalizing member to said pumping lever and said equalizing member may 4 have universal swinging movement relative to said pumping lever in consequence of the yielding of said body.` Y

4L In a pumping device having a pumping lever,

an equalizing member extending across the Y pumping lever and a pair of pitmans connected at the ends of the equalizing member: equalizing bearing means for said equalizing member and pumping lever comprising a body of rubbery material having operative connection With an intermediate portion of said equalizing member and said pumping lever so that movement will be transmitted from said equalizing member to said l .'Lpumping ilever fand, said equalzing: memberowill be held from rotationfabout ianxisextending sffromend tofend:thereof and will-have `ffreedom 'toiswingrelativetolsaidfpunipmglever;

" l f5. lIn.apumpingidevcefhaving:a pumping lever, 'ian'iIqualiZirig-rnember 'extending` across fthe "miping l'ever and apair'of pitmans connected ass around and 'l enclose w f h t:portionlo saidfbodyrof --rubbery material?saidislielllbei gli-formed'soas fvto' leaiflsaidequalizirigmeniber insuh a manner tsaid equalizrig member-mayhaveiswinging ement relative ito 'said y' pumping ilev'er @vvhile body f' rubbery '-m'a'teri'al itransmits Imovefmenti-fromsaidFedualizngmemberitosaidlpumping lever, and :meansfforcbnnecting said-shell to said pumping lever.

6. In a pumping device having a pumping lever, anequalizing member extending across the at the ends oi the equalizing member: equalizing bearing means for said equalizing member and pumping lever comprising a body of rubbery maequalizing member, and a shell arranged to pass around and enclose` at least a substantial portion of said body of rubbery material, said shell being formed so as to clear said equalizing member in such a manner that said equalizing member may `ing lever While said body of rubbery material transmits movement from said equalizing member to said pumping lever, and means for connecting said shell to said pumping leverat differeni-l points therealong so that the effective lever arm of said pumping lever maybe selectively varied.

7. In a, pumping device having a pumping lever, an equalizingV member extending across the pumping lever and a pair of pitmans connected at the ends of the equalizing member: equalizing bearing means for said equalizing memberand vpumping lever comprising a body of rubbery material extending around an intermediate portion of said equalizing member, and a shell arranged to pass around three sides of said body of rubbery material, said shell being formed so as-to clear said equalizing memberin such a manner that said equalizing mem-ber may have swim-gingY movement relative to said pumping lever while Vsaid body of rubbery material transmits movement from said equalizing member to said'pumping lever, and means for connecting said shell to said pumping lever.

the pumping lever and a pair of pitmans connected` at the ends of the equalizing member:

equalizing bearing means for said equalizing member and pumping lever consisting of a body of rubbery material having operative connection with an intermediate portion of said equalizing member and said pumping lever so that movemember to said pumping lever and so that said circumductory movement Vof said equalizing member around a point intermediate its ends, andV means of interengagement between said l.annie:endslerqtnefequauzmgmemberz equanzing pumping lever and apair of pitmans connected terial encircling an intermediate portion of said have swinging movement relative to said pump- 8, In a pumping device having a Vpumping lever, an equalizing member extending acrossment will be transmitted fromV said equalizing` f yielding of `said body Will enable universal and equalizing member and said shell to limit the Y movement"thereofy in '.eventvrof failure of said body of rubbery materaLm;y Y Y f2f9. In a pumping devce;having aepumping K lever, an e'qualizingr member extending across VVVthe pumping lever'and avpair ofv pitmans connec'tedzatthe ends of the Vequalizingy member:

i equalizing `bearing means` for said equalzng n memlserY and pumping lever: comprising; a exible member extendingv from the intermediate portion Vofrfsaidequalizing member to said pumpingv rlever, Ythere being v-meansto*hold said flexible member meooperativejrelation to said pumping leverxand said Yequalizing member so Vthat move- -'mentwill- ,be 'transmitted from said equalizing memb-ertogsaid pumping lever and so that said V"yielding: of'` said `body V,Will-enable Vuniversal and eircumductorymovement of said equalizing Ynf1ember-aroundl arpoint intermediate its ends;

and means to limit movement of said equalizing memberfrelative to` saidV pumping lever Ain .event of failure ofrsaid flexible member.

being adapted to Vclamp theiremainingA ywall f tom, and; lateralV sidesi of jsaid beam; tting closelyV around three of said walls and against said lever arm; and alpin extending through said equalizerbeam and said sleeve so that the ends thereof vvill engage saidshell so as totiirnit movementof said equalizer beam `re1 ,ative to said lever arm in event of failure of said sleeveY of rubberymaterial. v Y f CLIFFORD E.4 ANDERSON.- 

